State Transportation Building, Boston MA
The Transportation Building is a nine-floor structure located at the corner of Tremont and Stuart Streets in Boston MA. Excavation construction started in early summer 1981 and was completed in spring 1982. Perimeter slurry walls were used to form the two levels of underground parking that had to be provided.
Soil conditions in the project site are typical of the Boston area. Two levels of temporary tiebacks were used to hold back the slurry walls during the excavation phase. Braces were used for additional support in corner panels. Tiebacks and braces were removed once the garage floor slabs were installed and cured.
Tremont and Stuart Streets bound the eastern and southern sides of the project. Many buildings are adjacent to the north slurry wall. Starting from east to west these buildings were: Saxon Theatre, Walker Building, Tavern Club, Mansfield Beauty Academy, Hound Stooth, Fisher Music, Steinhert Hall, and Park Building. Most of these structures were supported on shallow foundations. Settlement control was important due to the proximity of these structures to the excavation.
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